Improvement in wood-sawing machines



L NrrED STATES @PATENT rrron.

FRANZ L. HARTEN STEIN AND SAMUEL HYMAN, OF NASHVILLE, TENNESSEE.

IMPROVEMENT IN WOOD-SAWING MACHINES.

Specification forming part of Letters Patent No. 126,808, dated May 14,1872.

by foot, hand, or other power. The first part of the invention 'relatesto the operating mechanism 5 and consists in a combination ofgearwheels, shafts, crank-disks or cranks, a connecting-rod, andiiy-wheel for operating the reciprocating frame or sash through themedium of spur-wheel and rack. The invention further consists, secondly,in saws adjustable as to distance apart, and further adapted, byspring-supporting arms for cutting fire-wood, the same projecting infront of the sash as required, being adapted to be applied and usedwithout detaching the scroll-saw, and to be readily detached as requiredwhen the latter is to be used. Thirdly, in a supplemental table attachedby screws, for use in place of the {ire-wood carriage, in connectionwith the scroll-saw.

Figure l is aperspective of the machine in normal condition, with thefire-wood, saws, and carriage, and the supplemental table, all detached,the position of theformer being indicated by dotted lines, and fragmentsofthe frame and sash omitted to expose parts behind. Fig. 2 is a plan,partly in section, representing the machine as arranged for sawingfire-wood. Fig. 3 is a perspective of the iirewood carriage; Fig. 4, alike View of the 'supplemental table. 4

In carrying out our invention wc employ a frame, A, which may be of woodor metal, being so constructed as to furnish suitable bearings, z, forthe several shafts, vertical guides y, for the saw-frame or sash, and ahorizontal table, m, behind the latter, and a corresponding horizontalsurface, w, in front of the same. Mounted transversely of this frame, inthe bearings z, are three shafts, B (l D. The first of these shafts, B,is the driver, and may be connected by crank@ and pitman E to atreadle,F, or adapted by crank or pulley to be driven by hand or by asteam-engine, or Vother motor. This shaft carries a spur-wheel, G,meshing with a pinion, H, on the second shaftO, which rotates withmultiplied speed and carries the iiy-wheel I. The third shaft, D,carries one or more spur-Wheels, J, meshing with a rack or racks, u, onthe upright bars of the sawframe or sash K, and is oscillated toreciprocate said sash by connection, through a long crankarm, or itsequivalent, L, connecting-rod M, crank-disk or crank N, pinion O, andspurwheel P, to the drivin g-shaft B, the said crankdisk N and pinion Obeing mounted on a studshaft, Q, or its equivalent. The horizontal barsof the sash K are adapted for the attachment, centrally, of the uprightscroll-saw R. On each side of this there are vertical slots t, toreceive bolts s which pass through and secure the sprin g-arms S, bywhich the fire-wood saws T are attached the said arms being so bent asto embrace three sides of the bars of the frame, as shown in Fig. 2, tosecure the requisite support. The slots t permit the adjustment of thesaws T to any desired distance apart within the width of the sash, toprovide for cutting wood in different lengths. Arranged in the fronthorizontal surface w of the frame A are rollers U, to support thefire-wood carriage V, Fig. 3, shown in position in Fig. 2. The wood issupported at the front edge of this by the upturned ends of longitudinalmetal bars r. A recess, g, in the saine receives the saws. It issupported laterally by flanges p, is drawn back inuse by a weight, W,attached to a cord, X, running over a pulley, Y, and secured in a ring,o, at the rear edge of the carriage, and is stopped by a cleat, n, onits under side. When the scroll-saw R is to be used the fire-wood sawsT, carriage V, and their removable appurtenances are detached, and thesupplemental table Z is applied to the surface w, and attached by screwsm, its inner end fitting into the space between the sash, sash-guides,and saw.

The operating devices work as follows: Rotary motion being imparted tothe drivingshaft B by the treadle F or its equivalent, the same isimparted, multiplied as to speed through thespur-wheel G and pinion H,to the secondary shaft C and the fly-wheel I, and multiplied as to powerthrough the spur-wheel P, pinion O, crank-disk N, connecting-rod M,crank-arm L, shaft D, spur-wheel or wheels J, and rack or racks u to thesaw-frame or sash. The mode of driving the saw secures a steady,powerful movement, the speed of which may be regulated :is desired.rl`he fly-wheel, as urrunged, eren at very slow speed, carries thecranks past their centers infullibly, und insures regular movement.

We elaizn us new herein und of our invention- 1. The combination of therotary driving"- shaft B, spur-Wheel l), pinion O, e1unk-dsl N,connecting-rod M, crank-arm L, shaft D, spur-wheel or Wheels J, and mokor racks u, arranged and operating substantially as de scribed, forreciprocating the saw-freine or sash K.

2. The combination, with said mechanism, vB P 0 N M L D J u, ofthespur-wheel G. pinion H, secondary shaft C, and ily-wheel I, for

the purposes specified.

substantially as represented und described, for

the purpose setforth.

. FRANZ LUDWIG HARTENSTEIN.

SAMUEL HYMAN.

Witnesses:

J. W. NnUeEs, JN0. T. OAssnTTY.

